Iron casting in series, machining, welded precision tubes and heating appliances from Dillingen/Saar.
BARTZ-WERKE GmbH
Dillingen/Saar · Dresden · Pöhla · ÜberherrnNew on Amplifa
Supplier of castings, tubes and heating technology since 1897
BARTZ-WERKE GmbH in Dillingen/Saar is a supplier of casting and tube technology founded in 1897. At the main plant in Dillingen, series-produced castings made of iron casting materials (grey cast iron EN-GJL and spheroidal graphite iron EN-GJS) are manufactured with an annual capacity of 12,000 tonnes, including electric motor and stator housings using the core block casting process. In-house machining at the Dillingen and Überherrn sites delivers castings ready for installation; jigs and fixtures, welded assemblies and surface treatments are also produced there. For automotive supply, filtration technology, chemicals and heating technology, welded precision tubes made of steel and stainless steel are manufactured using LASER and TIG welding processes. The trading division CASTrade, with an import and logistics centre in Dresden, sources and inspects castings from qualified partner foundries in Eastern Europe and Asia. Since 1985 the company, with around 200 employees, has belonged to the Dr. Schäfer Group in Saarlouis.
- Site
- Dillingen/Saar
- Processes
- Series casting (sand casting with automatic moulding line), Core block casting (electric motor housings, stator housings), Casting trading CASTrade (sourcing/distribution of castings from partner foundries, hand-moulded, Machining of castings (CNC machining centres, ready for installation), LASER welding of precision tubes (fully automatic production lines), TIG welding of tubes (fully automatic and conventional manual), Tube forming: annealing, smoothing of the weld seam, expanding, end forming, calibrating,, Surface treatments (painting, browning, galvanising, hardening, anodising)
- Materials
- Grey cast iron EN-GJL-150, Grey cast iron EN-GJL-200, Grey cast iron EN-GJL-250, Grey cast iron EN-GJL-300, Spheroidal graphite iron EN-GJS-400-15, Spheroidal graphite iron EN-GJS-400-18-LT, Spheroidal graphite iron EN-GJS-450-18, Spheroidal graphite iron EN-GJS-500-7
- Certificates
- ISO 9001:2015, ISO 50001:2018, AD 2000, ISO 9001, ISO 50001
- Founded
- 1897
- Employees
- approx. 200
- Industries
- Mechanical engineering, Automotive suppliers (exhaust technology), Electric motor manufacturers, Filtration technology, Chemicals, Heating technology
- 01
Pattern and mould making
- 02
Casting (sand casting/core block casting)
- 03
Heat treatment
- 04
Machining (CNC)
- 05
Surface treatment
- 06
Assembly/pre-assembly
- 07
Inspection and logistics
Materials and processes
Grey cast iron EN-GJL-150 to 300
Easy-to-machine grey cast iron for machine components subject to low to high strength requirements.
Spheroidal graphite iron EN-GJS-400 to 700
Ductile spheroidal graphite iron for dynamically stressed components, incl. low-temperature grade EN-GJS-400-18-LT.
Bartz special material GG25HS
Chromium-free, heat-resistant material up to 900 °C for high-temperature casting applications.
Bartz special material EN-GJS-520-15
Spheroidal graphite iron with increased ductility, improved yield strength ratio and uniform hardness distribution.
Bartz special material EN-GJS-600-7
Spheroidal graphite iron with increased ductility and improved machinability at high strength.
Sand casting on automatic moulding line
Series casting with flask dimensions 1,100 x 1,050 x 270/270+50 mm with split mould area in a modular grid.
Core block casting
Process for electric motor and stator housings up to 300 kg piece weight.
LASER welding of tubes
Fully automatic tube manufacturing for large and medium series with diameters of 80–250 mm and wall thicknesses of 0.4–2.0 mm.
TIG welding of tubes
Automatic and manual tube manufacturing for prototypes through large series, diameters 80–500 mm.
Locations
Dillingen/Saar
DEMain plant: series casting, machining, tube manufacturing, heating appliances
- Part weight / size
- Castings 1–250 kg (core block casting up to 300 kg); tubes Ø
- Lot size
- Small, medium and large series; tubes from one-off pieces to large series
- Materials
- EN-GJL, EN-GJS, special materials; steel, stainless steel
- Moulding line with automatic pouring device (flask dimensions 1,100 x 1,050 x 270/270+50 mm)
- 2 cupola furnaces
- HERMLE C 650
- HERMLE C 400
- HERMLE B300V
- HERMLE C 40U
- AVIA ENE50NC
- 2 fully automatic tube manufacturing lines (LASER/TIG)
Dresden
DECentral and logistics warehouse: import, incoming inspection, picking of castings and heating appliances
Pöhla (Erzgebirge)
DEEastern sales centre / stove studio
Überherrn
DEMachining site (Bartz Bearbeitung GmbH & Co. KG)
- HERMLE C 650
- HERMLE C 400
- HERMLE B300V
- HERMLE C 40U
- AVIA ENE50NC
- Lathes, drilling machines, sawing machines
Components
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Series casting (sand casting with automatic moulding line)Casting | – | 1,100 mm × 270/270+50 mm | 1 kg – 250 kg | Small series – Large series | EN-GJL-150, EN-GJL-200, EN-GJL-250, EN-GJL-300, EN-GJS-400-15, EN-GJS-400-18-LT, EN-GJS-450-18, EN-GJS-500-7, EN-GJS-500-14, EN-GJS-600-3, EN-GJS-600-10, EN-GJS-700-2, GG25HS, EN-GJS-520-15, EN-GJS-600-7 |
| Core block casting (electric motor housings, stator housings)Casting | – | – | 300 kg (own production) / up to 3 t | Series | Iron materials, EN-GJL, EN-GJS |
| Casting trading CASTrade (sourcing/distribution of castings from partner foundries, hand-mouldedCasting | – | – | 0.1 kg – 3 t | medium/large series (small parts) | EN-GJL-150, EN-GJL-200, EN-GJL-250, EN-GJS-400-15, EN-GJS-400-18-LT, EN-GJS-500-7, EN-GJS-600-3 |
| Machining of castings (CNC machining centres, ready for installation)Machining | – | – | – | – | Iron casting materials, EN-GJL, EN-GJS |
| LASER welding of precision tubes (fully automatic production lines)Joining | – | 700 mm × Diameter 250 mm | – | Medium series – Large series | Steel, Stainless steel |
| TIG welding of tubes (fully automatic and conventional manual)Joining | – | 600 mm (automatic) / 1,000 mm × Diameter 250 mm (automatic) / 500 | – | One-off pieces/prototypes – Large series | Steel, Stainless steel |
| Tube forming: annealing, smoothing of the weld seam, expanding, end forming, calibrating,Forming | – | – | – | – | Steel, Stainless steel |
| Surface treatments (painting, browning, galvanising, hardening, anodising)Surface | – | – | – | – | Castings, Metal |
| Assembly of module groups (pre-assembly of castings)Assembly | – | – | – | – | Iron casting materials |
| Manufacture of jigs and fixtures and welded assembliesJoining | – | – | – | – | Steel, Stainless steel |
| Solidification simulation, computer-aided gating and riser calculation, 3-D metrologyTesting | – | – | – | – | Iron materials |
10 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Moulding line with automatic pouring device (flask dimensions 1,100 x 1,050 x 270/270+50 mm) | – | 1 | 1,100 x 1,050 x 270/270+50 mm | – | Dillingen |
| Cupola furnace | – | 2 | – | – | Dillingen |
| CNC machining centre | HERMLE C 650 | – | – | – | Dillingen/Überherrn |
| CNC machining centre | HERMLE C 400 | – | – | – | Dillingen/Überherrn |
| CNC machining centre | HERMLE B300V | – | – | – | Dillingen/Überherrn |
| 5-axis machining centre | HERMLE C 40U | – | – | – | Dillingen/Überherrn |
| NC lathe | AVIA ENE50NC | – | – | – | Dillingen/Überherrn |
| Lathes, drilling machines, sawing machines (further) | – | – | – | – | Dillingen/Überherrn |
| Fully automatic tube manufacturing line (LASER/TIG welding) | – | 2 | Diameter 80–250 mm, wall thickness 0.4–2.0 mm | – | Dillingen |
| Conventional tube manufacturing machines (manual, TIG) | – | – | Diameter 80–500 mm, wall thickness 0.6–2.0 mm | – | Dillingen |
Additional services
Quality
The processes are certified by TÜV Saarland in accordance with DIN EN ISO 9001:2015; in addition, there is a certificate under AD 2000 and energy management according to ISO 50001:2018. Quality assurance includes computer-aided gating and riser calculation, solidification simulation and 3-D metrology; at the trading warehouse in Dresden, all purchased castings undergo an incoming inspection.
| Evidence | Dillingen/Saar |
|---|---|
| ISO 9001 | |
| ISO 50001 | |
| AD 2000 |
History
- 1897
Founded by Anton Bartz as a stove and oven factory
- 1985
Acquired by the Dr. Schäfer Group (Saarlouis)
- 1990
Eastern sales centre for heating appliances in Pöhla (Erzgebirge) joins the company
- 2002
Establishment of the trading division CASTrade with logistics centre in Dresden; sourcing of castings from partner foundries in Eastern Europe and Asia
- 2017
Castings with machining via the sister company Bartz Bearbeitung GmbH & Co. KG in Überherrn